Revert autoconf requirement to 2.68
Reverting 9a87658b944e78fd7bf94c4eb921954f4013a253
Add svg2glyph example script
Fix a thinko introduced in c852d95

When checking for lookup type in feature block, stop at feature limit
not a non-existing lookup limit; I blindly copy pasted that block of
code. This was causing all features to be of multiple substitution type
if one of them has a multiple substitution.
Merge pull request #560 from JoesCat/master

A Thinko
In gutils/gimagereadbmp.c, return error message if can't open/read file
In gutils/gimagereadbmp.c, getshort() now checks for file read errors.
In gutils/gimagereadbmp.c, exit if error reading bmp header info.

Added error check for getlong(). Changed fillbmpheader() to -1 on error.
In gutils/gimagereadbmp.c, move memory calls into GImageRead_Bmp()

Replaced galloc() with malloc() and gfree() with free().
Moved memory creation functions here so that error messages can be given
based on either lack of memory or due to file read errors.
In gutils/gimagereadbmp.c, cleanup if read error. gfree() now free().
In gutils/gimagereadbmp.c, missed these in copy-n-paste (of last 5 commits)
Merge pull request #561 from JoesCat/master

gallocs and gfree removed in gutils/gimagereadbmp.c
fix build
aggresively fix so
'make check' now tests linking to libfontforge.so
Merge branch 'tmp' of github.com:coolwanglu/fontforge into tmp